Chess Stalker — Free Chess Opponent Analysis

Analyze any Lichess, Chess.com or FIDE player's openings, weaknesses, blunder patterns and psychological profile. Train against a Twin Bot that replicates your opponent's style. Search by username or FIDE ID across 11 million+ games. Free to use, no signup required.

What you get

Opponent weakness analysis — opening repertoire, common blunders, time pressure patterns
Twin Bot — practice against an AI clone of your opponent's exact playing style
FIDE OTB database — 11 million+ tournament games and 1.7 million+ rated players
Stockfish-powered analysis with depth-25 evaluations
Multi-platform: Lichess, Chess.com, and FIDE in one place
Head-to-head comparison, Nemesis detection, Stalker Score

How it works

Search any Lichess, Chess.com username or FIDE player
Get instant scouting report with weaknesses and patterns
Prepare your strategy and practice against the Twin Bot

IM

Bersamina, Paulo

PHI PHI·Born 1998·FIDE #5206995·914 Games

Classical2423883 Games

Rapid234114 Games

Blitz227917 Games

Statistics

914

Total

334

Wins

336

Draws

244

Losses

37%37%27%

Play Style

What you need to know before facing them

Elite accuracy: 93.8% average

Very consistent (86%)

Very precise: only 0.1 blunders/game

Dominates 1.Nf3 ♔ (68% in 11 games)

Vulnerable to 1.c4 ♚ (only 45%)

Deep Analysis

Stockfish 18 · Classical games · 155 analyzed

Accuracy by phase

Opening96.3%

Middlegame94.0%

Endgame95.7%

Clutch Factor

Performance under pressure

+6%

Winning (+2 or more)95%

48 Games

Equal position95%

76 Games

Losing (-2 or more)89%

31 Games

Problematic Pieces

Which pieces cause most errors?

♖

26%

28 errors

♙

25%

27 errors

♕

14%

15 errors

♔

13%

14 errors

♗

12%

13 errors

♞

10%

11 errors

Critical Moment

When does the first serious error occur?

Move 47average

1-15

16-25

26-35

36-45

46+

45% of blunders occur between move 46+. Keep tension until that moment.

Error Heatmap

Where do most errors occur?

4

6

4

3

4

5

5

3

4

4

abcdefgh

Many

Few

Critical squares

c66 err

d55 err

e55 err

b74 err

c44 err

c6/d5 concentrate most errors. Force decisions in those zones.

Recent Games

L

Pakleza, Zbigniew2499

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Gordievsky, Dmitry2524

1st 3-0 Thu 28th May 2026 · 28 May 2026

0-1

L

Rustamov, Rustam2340

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Kourkoulos-Arditis, Stamatis2570

1st 3-0 Thu 28th May 2026 · 28 May 2026

0-1

W

Pragnya H G2132

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

W

Tudor, Henry Edward2460

1st 3-0 Thu 28th May 2026 · 28 May 2026

1-0

Openings

Based on player games

Weaknesses

EXPLOIT!

White

Sicilian: e6 Systems

53.3%

15 Games·Loses

1.e4 c5 2.Nf3 e6

Black

Sicilian: e6 Systems

52.2%

23 Games·Loses

1.e4 c5 2.Nf3 e6

Strengths

AVOID

White

Caro-Kann: Advance

66.7%

12 Games·Wins

1.e4 c6 2.d4 d5 3.e5

French: Winawer

60.0%

10 Games·Wins

1.e4 e6 2.d4 d5 3.Nc3 Bb4

Black

No consistent strengths detected as Black

Critical Blunders

Tactical errors analyzed with Stockfish

10 errors

▶

#118Qc6+??

Endgame

vs Aditya Mittal

OTB·2025

▶

#60Kd5??

Endgame

vs Nihal Sarin

OTB·2025

▶

#34Qh8??

Tactics

vs Nguyen

OTB·2025

▶

#47Kc4??

Endgame

vs Siddharth

OTB·2025

▶

#31Nc5??

Tactics

vs Amartuvshin

OTB·2025

▶

#64Ra2+??

Endgame

vs Batashevs

OTB·2025

▶

#50Kd7??

Endgame

vs Arfan

OTB·2024

▶

#61Kxd4??

Endgame

vs Pham Tran Gia Phuc

OTB·2024

▶

#56Ra4??

Endgame

vs Livaic

OTB·2024

▶

#37Be4??

Tactics

vs Tran

OTB·2023

Endgame Statistics

23 endgame categories analyzed — discover where they collapse under pressure

Repertoire

☰ All

♟ Classical

⚡ Rapid

🔥 Blitz

PRO

·

2026

2025

2024

2023

2022

2021

PRO

8

7

6

5

4

3

2

1a

b

c

d

e

f

g

h

Starting Position

455 Games

42%35%23%

Move	Games	Performance	%
1.e4	391		59%
1.d4	37		60%
1.c4	15		67%
1.Nf3	11		68%
1.b3 Weak	1		0%

1.e4

59%

391

1.d4

60%

37

1.c4

67%

15

1.Nf3

68%

11

1.b3

0%

1

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